Update runtime files
diff --git a/runtime/indent/zimbu.vim b/runtime/indent/zimbu.vim
index 5451877..0e6e2ab 100644
--- a/runtime/indent/zimbu.vim
+++ b/runtime/indent/zimbu.vim
@@ -1,7 +1,7 @@
" Vim indent file
" Language: Zimbu
" Maintainer: Bram Moolenaar <Bram@vim.org>
-" Last Change: 2016 Jan 25
+" Last Change: 2021 Sep 26
" Only load this indent file when no other was loaded.
if exists("b:did_indent")
@@ -16,7 +16,7 @@
" We impose recommended defaults: no Tabs, 'shiftwidth' = 2
setlocal sw=2 et
-let b:undo_indent = "setl et< sw< ai< indentkeys< indentexpr="
+let b:undo_indent = "setl ai< cin< et< indentkeys< indentexpr< lisp< sw<"
" Only define the function once.
if exists("*GetZimbuIndent")